A THEORETICAL ANALYSIS AND EXPERIMENTAL STUDY OF A COUPLED SCREW-PNEUMATIC CONVEYOR FOR CHOPPED CORNSTALKS

Various problems are encountered during the screw feeding process of chopped cornstalk. Therefore, it is important to deeply analyze and understand the relationship between conditions and productivity of screw conveyors. This study reveals the influence of air velocity, pitch, rotational speed, and feeding rate on productivity, power consumption, specific power consumption and pressure of material for a coupled screw-pneumatic conveyor. Through a theoretical analysis, a mathematical model is established that simultaneously considers the compression characteristics of the material, material pressure from the change in pitch and centrifugal force of the screw axis, productivity of the coupled screw-pneumatic conveyor, power consumption and specific power consumption. Then, experiments are conducted to investigate the influence of the structural and working parameters of the conveyor on its performance. Finally, the correctness of the theoretical calculation is verified through a comparison with experimental results. The results of the theoretical